Abstract

In the present paper we have discussed the Mathematical Properties of non static and non empty cosmological modelswith variable Cosmological constant (?) & variable Gravitational constant (G) under some suitable assumptions. It maybe concluded that the Cosmological constant (?) may be replaced by a non-linear scalar field. It has been also focusedthat there is close relation between model with scalar field & model with perfect fluids whose equation of state is more orless exotic.

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